. >> you're looking at science at a whole different level and excited as a physician and a surgeon, this is a major break through. six of these procedures have already been performed in toronto and this is the first one being done at johns hopkins and we're excited about this, and the second case, it's scheduled in december. as we mention about 70,000 of the procedures have been done for parkinson's, we see less tremor and really good outcome. what's important,a-- they have a clinical trial, and 20 patients are getting the battery of pacemakers and 20 followed up and we'll see what the result is going to be. the outcome of this trial should be out within a year and preliminary results should show that the pace of this short-term memory and slowing of the brain is going to be much less. so, this is a very exciting field and the fact that it's been done so many times, tells us it's quite safe. >> quickly before i let you go. do we know at this juncture if there's a certain stage of alzheimer's that you should actually treat this person with a pacemaker? >> i'm so glad that you brought this